Question

Observe the experimental set up carefully and answer the following questions (a) What happens to the empty paper cup? (b) What happens to the paper cup with water? (c) Does water in this cup become hot? Explain​

Answer 1

Answer:

(a)The empty paper cup catches fire easily and starts burning because the ignition temperature of paper reaches quickly. ... When we heat the paper cup containing water, then the heat supplied to the paper cup is transferred to water inside it by conduction.

(b)If the paper cup is heated carrying water, the water will be absorbing the heat coming from the burning source and thus stops the paper from reaching its ignition point. Therefore it will not burn. ... This is because of the absorption of heat by water in it.

(c)If the paper cup is heated carrying water, the water will be absorbing the heat coming from the burning source and thus stops the paper from reaching its ignition point. ... Instead of this, water in the cup becomes hot. This is because of the absorption of heat by water in it.

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